Master NEET Zoology with topic-wise questions. Tailored for NEET students, these questions strengthen your Biology preparation.
The Miller-Urey experiment attempted to simulate early Earth conditions to test the chemical origin of life. Which of the following gaseous components was NOT included in their experimental setup, despite being potentially present in the early atmosphere?
Methane ()
Ammonia ()
Water vapor ()
Oxygen ()
The RNA world hypothesis proposes that RNA, not DNA, was the primary genetic material in early life. Which characteristic of RNA makes it a more plausible candidate for this role compared to DNA?
Double-stranded structure
Higher stability
Catalytic activity
Presence of thymine
Protocells are considered a key step in the origin of life. Which of the following is NOT a characteristic typically associated with protocells?
Membrane-bound compartments
Simple metabolic activity
Ability to undergo fission
Developed DNA replication mechanisms
Which of the following is a critical argument against the theory of panspermia related to the origin of life on Earth?
Meteorites have been found to contain organic molecules.
Life on Earth shares a common genetic code.
Microbial life has been found in extreme environments on Earth.
The harsh conditions of space, including radiation and extreme temperatures, would likely destroy any known life forms during interstellar travel.
Which of the following best describes the significance of coacervates in the context of the origin of life?
They are fossilized evidence of the earliest life forms on Earth.
They prove that RNA was the primary genetic material in early life.
They demonstrate how membrane-bound compartments, crucial for cellular life, could have arisen spontaneously from organic molecules.
They explain the mechanism by which the first self-replicating molecules were formed.
The concept of punctuated equilibrium challenges the traditional view of evolution by suggesting:
Evolution proceeds at a constant, gradual rate.
Long periods of stasis punctuated by rapid bursts of evolutionary change.
Evolutionary changes occur only in small, isolated populations.
Acquired characteristics are inherited and drive evolutionary change.
The evolutionary significance of the Burgess Shale fossils lies primarily in:
Providing evidence for the earliest forms of life on Earth.
Demonstrating a rapid diversification of body plans during the Cambrian explosion.
Showing the transition from aquatic to terrestrial life.
Illustrating the co-evolution of plants and animals.
The concept of 'adaptive radiation' is BEST exemplified by:
The evolution of antibiotic resistance in bacteria.
The development of camouflage in a prey species.
Darwin's finches on the Galapagos Islands developing diverse beak shapes for different food sources.
The gradual increase in size of a particular species over generations.
Which scenario would MOST likely lead to allopatric speciation?
Two closely related plant species hybridizing in a shared habitat.
A mutation arising in a single individual within a population.
A river changing course and dividing a population of rodents into two isolated groups.
Seasonal variations in food availability leading to different feeding behaviors within a bird species.
The phenomenon of industrial melanism in Biston betularia demonstrates which evolutionary force most directly?
Genetic drift due to a bottleneck effect
Gene flow between moth populations
Mutation creating new melanic alleles
Natural selection driven by environmental change
